Inverted-F multi-frequency antenna based on Hilbert fractal

Abstract

The invention discloses an inverted F multi-frequency antenna based on Hilbert fractal, which includes a dielectric substrate, a radiation patch, a ground plate and a feed network, and the radiation patch is set as an inverted F based on Hilbert fractal Shape, the size of the dielectric substrate is 110mm×50mm×0.8mm, it is made of glass fiber epoxy resin material FR4, the dielectric substrate is provided with via holes, the relative dielectric constant of the dielectric substrate is 4.4, and the dielectric loss The tangent value is 0.02; the ground plate is located on the lower side of the dielectric substrate, and the size is 90mm×50mm. The radiation patch is located on the upper surface of the dielectric substrate, and the radiation patch includes a Hilbert fractal resonance part, There are three parts: a ground hole and an excitation port. The ground hole of the antenna is connected to the ground plate through the via hole, and the excitation port is a feeding point. The size of the antenna of the invention is greatly reduced, suitable for wireless communication systems and equipment, and is a research hotspot in the electromagnetic field and wearable equipment field recently, and has great development prospects.

Description

technical field [0001] The invention relates to the field of antennas, in particular to an inverted F multi-frequency antenna based on Hilbert fractal. Background technique [0002] The development of modern communication puts forward higher and higher requirements for the miniaturization and multi-frequency resonance of the antenna. One way to miniaturize the antenna is to add a ground plane, which can reduce the size of the antenna by half by using the image effect of the metal conductor. Adopting an inverted F or inverted L structure is another effective method for antenna miniaturization and low profile design. However, the frequency band utilization rate of the inverted F antenna is low, and it can only show a good match in one frequency band. It is a hot topic in recent years to construct an antenna with a fractal curve. People often use its space-filling ability to increase the electrical length of the antenna. , improve the radiation capability of the antenna, and ...

AI Technical Summary

Problems solved by technology

However, the frequency band utilization rate of the inverted F antenna is low, and it can only show a good match in one frequency band. It is a hot topic in recent years to construct an antenna with a fractal curve. People often use its space-filling ability to increase the electrical length of the antenna. , improve the radiation capability of the antenna, and realize the multi-frequency and multi-mode design of the antenna

Images